package 第六周.practice;
import java.util.Scanner;
public class LetterCount {
 //Reads a sentence from the user and counts the number of
 //uppercase and lowercase letters contained in it.
 public static void main(String []args)
 {
     final int NUMCHARS = 26;
     Scanner scan = new Scanner(System.in);

     int[] upper = new int[NUMCHARS];
     int[] lower = new int[NUMCHARS];

     char current ;//the current character being processed.
     int other = 0;//counter for non-alphabetics
     System.out.println("Enter a sentence:");
     String line = scan.nextLine();

     //count the number of each letter occurence.
     for(int ch = 0; ch < line.length();ch++)
     {
         current = line.charAt(ch);
         if(current >= 'A' && current <='Z')
             upper[current-'A']++;
         else
             if(current >= 'a' && current <= 'z')
                 lower[current-'a']++;
             else
                 other++;
     }
     //Prints the results.
     System.out.println();
     for(int letter = 0;letter<upper.length;letter++)
     {
         System.out.print((char)(letter + 'A'));
         System.out.print(": "  +upper[letter]);
         System.out.print("\t\t"+(char)(letter + 'a'));
         System.out.println(": "+lower[letter]);
     }
     System.out.println();
     System.out.println("Non-alphabetic characters :" +other);
 }
}
